Sash-pivot.



No. 897,449. PATENTED SEPT. 1, 1908. F. BOGENBERGER.

SASH PIVOT.

APPLICATION FILED APR. 16, 1908.

2 SHEETSSHEET 1 SHEET 2,

lwuawtoz 2 SHEBTS PATBNTED SEPT. l. 1908.

F, BOGENBERGERH SASH PIVOT APPLIGATION FILED APR.16, 1908.

UNTTE sTAtrEs PA'rnr on TEE.

FREDERICK BOGENBERGER, OF MILWAUKEE, WISCONSIN.

sasnrrvo'r.

Specification of Letters Patent.

Patented Sept. 1, 1908.

Application filed. April 1c, 1908. Serial No. 427,455.

waukee and State of Wisconsin, have invented certain new and usefulImprovements in SaslbPivots; and I do declare the following to be afull, clear and exact description of the invention, such as will enableothers skilled in the art to whichit appertains to make and use thesame.

This invention relates to sash pivots and particularly to an improvedpivot-or pivoting mechanism to be used in connection with fire-proofwindows whose sashes and frames are made up of sheet metal.

The object of the invention is to provide a device of this characterwhich is hmitedkin its movement, and which closes automa 1cally whenreleased so as to cut oil draft through the building.

Preferably these windows:are held open by fusible links so that upon anexcessiverise in temperature, due to a fire or other similar cause, theyare released and swing into closed position automatically, and while Ihave not shown any means for holding the sash in open position, I wishit understood that I may use any automatic means for releasing the sashupon a predetermined rise 1n temperature, the universal means ashereinbefore stated being g fusible link. I

A further object of the invention is the provision of means foradjusting the pivotal connection of the sash so that no manner ofwarping, expansion or contraction will hold the sash in open positionwhen it is desired to have it closed.

Another object of the invention is .to provide mean whereby the limitingmeans above mentioned may be rendered inoperative so as to permit thewindow to be swung oplen to a greater degree for washing or any '0 erpur ose.

Vi ith these and other objects in view, the invention. consists ofcertain novel features of construction, combination and arrangement. ofparts as will be described and particularly pointed out in the appendedclaims.

,In the accompanying drawings, Figure 1 is a front elevation; Fig. 2 isa fragmentary front elevation, partly in section, and on an enlargedscale; Fig. 3 is a fragmentar vertical sectional view taken on line 33 0Fig. 2

Fig. 4 is an enlarged detail sectional View of the pivot bolt and-itsassociated parts; and Fig. 5 is a modification thereof.

Referring more particularly to the drawings, and especially'to Fig. 1,where the sash is pivoted in the frame, I have indicated the sash by thenumeral. 1, and the frame by the numeral, 2. Both the sash and the frameare constructed in a similar manner and are Secured to the frame, 2, isa supporting.

arm, 6,, by bolts,- 7, which pass through the enlarged apertures, 8, ofthe frame, 6, and engage the backing, 4, of the frame. These aperturesare made of a considerably larger internal diameter than the externaldiameter of the bolt so as to permit of ad'ustment at all times. As thearms and 0t er connections with the sash are identical on both sides ofthe frame, I shall describe onlyone, and its associated parts. The arm 6is bent outwardly as at 9, and is then provided with an upstandingprojection, 10, apertured at 11 to receive the pivot bolt, 12, whichpasses through the hushed opening, 13, formed in v the right-angularflange, 14, of the sash plate,

15. The bolt, 12, is threaded into'the aper- I ture, 11, so as to holdit stationary with respect to the arm, 6, so that the sash. rotates uponthe enlarged portion of the belt which is within the bushed opening, 13.The

flange, 14, is provided above the wit, 12, and 1 adjacent the body, 15,with a pivot pin, 16, upon which is carried a limiting awl, 17 having aweighted outer end, 18, anc a thumb piece, 19, for raising the same. Vihen the sash is tilted uponthe pivotal bolt, .12, the

pawl travels over the upper surface of the arm, 6, until'it engages thelimiting stud, 20, formed upon the arm, which prevents any furthermovement of the sash. By pressing back on the thumb piece 19 of thepawl, the latter may be carried over the lug 20 so that the framemay betilted to any desired position for thepurpose of washing the glass, orfor any other purpose. The thumb piece arranged so that the weighted endof the limiting pawl cannot be tilted past the center,

because the thumb piece engages the sash when pressed back and whenreleased it will drop by gravity upon the u per surface of the arm 6.Unless held open by the fusible link before mentioned, the sash willdrop back to normal or closed position, owing to the fact that the sashplate, 15, and the pivot bolt are slightly above the horizontal centerof the frame.

In the modification shown in Fig. 5, the frame 2 is provided with abushed opening, 21, throu h which the smooth outer end, 22, of the boTt,23, is adapted to pass, the bolt being held securely in the flange 14 byscrew threads, 24.v 'These bushings around the openings are of brass, orother non-rusting material in order to conform to the regulations of theNational Board of Fire Underwriters, which requires that hinge parts of-fire-pr0of windows be of ,non-corrosive metals.

From the foregoing description, taken in connection with theaccompanying drawings,

the invention as defined in the appended claims.

Having thus described my invention, what I claim as new and desire tosecure by Letters Patent, is:

1. A sash pivoting device comprising a sash plate member secured to theframe of the sash, a sup orting member adjustably secured to the stlleof the frame, a pivot bolt secured. to one of said members and havingivotal connection with the other member, a imiting stud on thesupporting member, and a pawl carried by the sash supporting memberadapted to engage said stud to determine the movement of the sash.

2. A sash pivoting device comprising a sash plate secured to the frameof the sash, an arm adjustably secured to the stile of the frame, apivot bolt secured to the arm and having pivotal connection with theplate, a limiting stud on the arm and a pawl carried. by the plateadapted. to engage said stud to determine the movement of the sash.

In testimony whereof I have hereunto set my hand. in pri-isence of twosubscribing witnesscs.

FREDERICK BOGENBERGER. Witnesses:

ELLA M. MiLL-ER, PAUL L. BIERSAGT.

